FILMTEC™ BW30-440i

The FILMTEC BW30-440i element is a high-productivity element combining the highest active membrane area in the industry with the high rejection BW30 membrane. It is designed to minimize capital expenses in high-purity industrial water applications without increasing operating flux.

  • Produces 10% more water compared to the FILMTEC BW30-400 element at the same operating pressure and high rejection, enabling lower capital expense for new systems, or increased water production in an existing system.
  • Includes iLEC™ interlocking endcaps, which reduce system operating costs and the risk of o-ring leaks that can cause poor water quality.
  • Designed using an industry standard 1.125 inch ID permeate tube for interchangeability with other brackish water elements.
Product Name Nominal Active Surface Area
ft2 (m2)		 Permeate Flow Rate
gpd (m3/d)		 Stabilized Salt Rejection
(%)		 Minimum Salt Rejection
(%)
FILMTEC BW30-440i 440 (41) 11,500 (43) 99.5 99.0
1. Permeate flow and salt rejection based on the following test conditions: 2000 ppm NaCl, 225 psi (15.5 bar), 77°F (25°C), pH 8, and 15% recovery.
2. Flow rates for individual elements may vary but will be no more than 15% below the value shown.
3. Sales specifications may vary as design revisions take place.
4. Active area guaranteed +/-3%. Active area as stated by FilmTec is not comparable to nominal membrane area often stated by some manufacturers. Measurement method described in Form No. 609-00434 (4223KB PDF).




These membranes may be subject to drinking water application restrictions in some countries: please check the application status before use and sale.


®™* Trademark of The Dow Chemical Company ("Dow") or an affiliated company of Dow
Related Links
Datasheet – English (58 KB PDF)
Datasheet – 中文 (254KB PDF)
Datasheet – Français (68KB PDF)

Case History 1 – English (327KB PDF)
Case History 2 – English (498KB PDF)
Case History 3 – English (212KB PDF)